Pedestal-extension-table lock.



J. A. BARBRAKE.

PEDBSTAL EXTENSION` TABLE LOOK. APPLIOATION FILED MAY 21,71908;

918,725;` 1 l Patented Apr,2o,r19o9.

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.JOHN ALBERT BARBRAKE, OF CANTON, OHIO, ASSIGNOR TO THE SENG COMPANY OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

'IPEDESTAL-EXTENSION-TABLE LOCK.

Specicaton of Letters Patent.

Patented April 2o, 1909.

Application fledjMay 27, 1908. Serial No. 435.202.

To all whom it may concern:

Be it known that I, JOHN ALBERT BAR- BRAKE, a subject of the Emperor of Germany, residing at Canton, in the county of Stark and State of Ohio, have invented a new and useful Improvement in Pedestal-Extension-Table Locks, of which the following is a' specification.

The invention relates to means kfor engaging and drawing together the pedestal parts of a divided pedestal extension table, and for locking them in this relation; and the object of the improvement is to provide a simple and effective lock which can be applied to any ordinary table without special preparation or change in the construction thereof, and which can be readily ada ted and adjusted toV operate with equal orce and effectiveness at the edges of the pedestal parts on each side of the center leg, This object is attained, in a general way, by mounting a transverse angular rock bar on the upper part of one pedestal part, with rock arms slidable thereon, and by mounting mechanisms on the edges of the same pedestal part intermediate its top and bottom, adapt- -ed to engage and draw against posts onk the opposite pedestal parts, with adjustable links between the rock arms and the engaging devices, and means for operating and locking the device.

The invention, thus described in generaltion of one pedestal part, showing the lock thereon in open position; Fig. '3, a verticallongitudinal section of the pedestal parts showing the lock thereon in open relation in broken lines and in lclosed yrelation in full lines; Fig. f1, a fragmentary plan view of a modified form of the rock bar and its connections; and Fig. 5, a modified form of engaging mechanism. i

' Similar numerals refer to similar parts throughout the drawings. The divided pedestal parts 1f and l, the attached bridging2 and 2a, the slides 3, 3a and 3b, the table top`parts 'L1 and 4a, with the center leg 5 and its attached bridging 6, may be of any ordinary form usually employed in tables of this type; andthe locking device is composed of the handle 7, the handle-link 8,

the rock-lever 9, the rock-bar 10, the bearings 11 and 11a, the rock-arms 12, the clevises 13, the adjustable links 14, the engaging mechanisms 15, all mounted on one pedestal part, as 1; and the engaging posts, as 16, which are formed or attached on the inside edges of the other pedestal part, 1a.

The engaging mechanisms specially described and claimed herein, are each composed of the vertically disposed bolt 17, located adjacent to the edge of the pedestal part, the links 18 and 18, one of which is eX- tended to form the lever 19, and the bracket 20, which bracket is formed or attached on the inner side of the edge of the pedestal part 1 intermediate the top and bottom thereof. The links arepreferably parallel with each other and the respective ends are pivoted to the bolt and to the bracket. When the mechanism is o erated by means of the linklever, the bolt is-swung upward and downward, and to and from the pedestal part, and in this movement it is preferably maintained constantly in vertical position by means of the other link. The lower end of the bolt is preferably provided with the beveled faces 21 and 21, thus forming the point 22;v and the normal relation of the parts when the lock is open, is referably with the parallel links in horizonta position, as shown in Fig. 1, and, by broken lines, in Fig. 3. In this relation of the engaging mechanism, the point ofthe bolt is adapted to pass freely over the upper side of the corresponding engaging posts located on the opposing pedestal section, when the pedestal sections are closed nearly together; after which, by an operation of the mechanism, the bolt is thrown downward, and also inward toward the' pedestal part to which it is attached, and 1n this movement, the inside bevel on the end of the bolt comes in contact with the upper rear side of the engaging post, and by a sliding action draws the same and the pedestal part to which it is attached toward the pedestal part to which the mechanism is attached. A further movement of the bolt brings its inner vertical side 23 squarely against the rear side of the engaging pin, and thus the operation is completed by a direct and substantially horizontal pull of the engaging parts.

One engaging mechanism is mounted on each side edge of the pedestal part, and an engaging post on each corresponding edge of the opposing pedestal part, so that by an operation of the engaging mechanism, both sides of the pedestal parts are engaged and drawn together at the same time. ln case the point oit the bolt does not quite clear over the opposing engaging post When the pedestal parts are closed together, the outside bevel on the end oi` the bolt comes in contact with the upper Vl'orward side ol' the post, and the bolt is thus thrown upward to clear the post by the sliding of the bevel thereon.

The transverse roclebarl() is angular in cross section, preferably square as shown, and isrotatably mounted in the bearings 11 and 11a, Which in turn are secured on the upper side ol the bridging 2 attached to the pedestal part on which the engaging mechanisms are mounted. The bearings 11 a are lo` cated at the ends of the roclebar, and the bearing 11 is located intermediate the same, the latter bearing being preferably formed or securely attached on the inner end ol' the ilat bar 2e, Which is secured tothe bridging. To the outer end oll the same flat bar, the shorter arm oi' the L-shaped handle 7 is pivoted. The rock-'lever 9 `is formed or attached at or near the middle part el the roclrbar, and, as shown, is preferably adapted to be transversely adjusted along` the same, which adjustment is accomplished by inserting the bar an angular aperture in the lever corresponding to the section of the bar. The free end oll the lever is connected to the angle of the handle by means ol' the link S, andthe rock-bar is adapted to be rotated by an operation ol' the handle Which is accomplished by grasping and manipulating the longer arm thereof.

T Wo rock-arms 12 are mounted on each end portion oli' the rock-bar, preferably inside the bearings 11PL thereof, by means ol' angular apertures corresponding to the cross section ol' the bar, yso that like the lever they are adapted to be transversely adjusted by Sliding along the bar, and a clevis 13 is pivoted to the l'ree ends oil each pair ol rocharms, The elevises are connected to the link-levers 19 of the engaging mechanisms by means of the'linls 14 Which are made adjnstable by passing the upper threaded ends 25 .through apertures in the elevises and providing vthe nuts 26 above and below the clevises.

By means of these various devices and connections, the engaging mechanisms are adapted to be operated by the handle; and the ivotal connections of the ends of the han le-link with the handle and the rock-lever, are so located and arranged With reierence to the pivot of the handle-arm, that When the loch has been operated to engage and draw the pedestal parts tightly together,

the handleflink pivot will have passed @brosse and berend .the .line 0f the handlearm and roch-lever pivots, in the usual man-- ner to a suitable stop, whereby the engaging mechanisms are locked. lt is evident thaty by asliding ofthe rock-arms and the elevises along the roclebar, the same are always located directly over the engaging mechanisms, so that the same are operated by a direct pull; and that by the adjustment ol the connecting-links 14:, the engaging and draw" ing ellect olf f ich mechanism is adapted to operate with equal lorce, thus rectil'ying any imperfections in the making, assembling or location of the respective i arts of the lock on the table.

A modiiied form ol the roch-ar and its connections is shown in liig. et, wherein a clevis 13 is employed in connection with a pair of rock-levers 9 for connecting the same to the link S, which is made adjustable by means of threading its outer end and providing the nuts 2G:L thereon, in which case the links 14 may be connected to single transversely slidable rock-arms as 12l. lt evident that this modified form of the rockbar and its connections can bc employed in combination with the engaging and drawing mechanism above described without ail'ecting the essential characteristics of the same. And, it is also evident, that the ordinary form of curved locking bolts 27, illustrated in Fig. 5, can be employed in connection with the operating devices hereinabove described, Without a'Hecting the essential characteristics of the same.

`What l claim as my invention, and desire to secure by Letters Patent, is

1. ln a divided-pedestal extension-table loch an engaging mechanism, including a bolt adjacent to the edge of one pedestal part, two linlis having their respective ends pivoted to the bolt and to the same pedestal part, with means for operating and locking the mechanism, and a post on the other ed estal part adapted to be engaged by the lbolt to draw the pedestal parts togetlgier.

2. ln a divided-pedestal extension-table loch an engaging mechanism ii'icluding a movable bolt adjacent to the edge of one pedestal part and having its ends beveled,'t\vo links having their respective ends pivoted to the bolt and to the same pedestal part, and a post on the other pedestal part adapted to be engaged by the bolt to draw the pedestal parts together.

3. ln a divided-pedestal extension-table lock .an engaging mechanism including a movable bolt adjacent to the edge oli one pedestal part, two links having their respec tive ends pivoted to the bolt and to the same pedestal part, and a post on the other pedestal part adapted to be engaged by the-bolt to draw the pedestal parts together.

4. In a divided-pedestal extension-table lock, a pair of posts on the sides oll one pedestal part, `a pair of mechanisms ron the other pedestal part adapted to engage the posts to draw the pedestal parts together, a transverse angular rock-bar on the same pedestal part With tWo pairs of transversely slidable rock-arms thereon, clevises pivoted to the respective pairs of rook-arms, and links connecting the mechanisms and the'clevises.

5. In a divided-pedestal extension-table look, a pair of posts on the sides `of one pedestal part, a air of bolts on the other pedestal part a apted to engage the posts to draw the pedestal parts together, a transverse angular rock-bar on the same pedestal part With tWo pairs of transversely slidable rock-arms thereon, clevises pivoted to the respective pairs of rock arms, and connections between the clevises and the bolts.

6. In a divided-pedestal extension-table lock, a pair of posts on the sides of one pedestal part, a 1pair of bolts on the other pedestal part ac apted to engage vthe posts to draw the edestal parts together, a trans# verse angu ar rock-bar on the same pedestal part With transversely slidable rock-arms thereon, and connections between the rockarms and the bolts.

JOHN ALBERT BARBRAKE.

Witnesses:

JOSEPH FREAsE, RUTH A. MILLER 

